10-24 x 1/4 Phillips Fillister Head Machine Screw Fully Threaded Zinc YPG and the 4 1/2 refers

and the 4 1/2 refers to the length of the bolt

Ensure secure and reliable fastening with our 5/16 x 2 x

Securely fasten components with our 1/4-20 x 3/8 3 Prong Tee Nut Zinc

The washer is corrosion-resistant

It is made from steel and has a zinc yellow and bake finish

10-24 x 1/4 Phillips Fillister Head Machine Screw Fully Threaded Zinc YPG and the 4 1/2 refersThese 10 24 x 1 4" Phillips Fillister Head Machine Screws are fully threaded and zinc plated for durability. They are designed for use in a variety of applications, including metalwork, woodworking, and electronics. The Phillips drive head provides a secure grip for driving, and the fillister head sits flush with the surface of the material. These screws are available in a variety of lengths to meet your specific needs.